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clk: rockchip: rk3368: add cru regs dump for panic

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Add cru regs dump when system panic.
It's just for debug.

Change-Id: I3aeeeb7f7b9240c917c18bc2d36b082003dc6370
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
This commit is contained in:
Elaine Zhang
2019-03-26 15:27:40 +08:00
committed by Tao Huang
parent 6cbf201cec
commit e83dd493be
3 changed files with 35 additions and 0 deletions
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17
drivers/clk/rockchip/clk-rk3368.c
View File

@@ -864,6 +864,18 @@ static const char *const rk3368_critical_clocks[] __initconst = {
"pmu_hclk_otg0",
};
static void __iomem *rk3368_cru_base;
static void rk3368_dump_cru(void)
{
if (rk3368_cru_base) {
pr_warn("CRU:\n");
print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET,
32, 4, rk3368_cru_base,
0x41c, false);
}
}
static void __init rk3368_clk_init(struct device_node *np)
{
struct rockchip_clk_provider *ctx;
@@ -906,5 +918,10 @@ static void __init rk3368_clk_init(struct device_node *np)
rockchip_register_restart_notifier(ctx, RK3368_GLB_SRST_FST, NULL);
rockchip_clk_of_add_provider(np, ctx);
if (!rk_dump_cru) {
rk3368_cru_base = reg_base;
rk_dump_cru = rk3368_dump_cru;
}
}
CLK_OF_DECLARE(rk3368_cru, "rockchip,rk3368-cru", rk3368_clk_init);

17
drivers/clk/rockchip/clk.c
View File

@@ -733,6 +733,21 @@ void rockchip_clk_protect_critical(const char *const clocks[],
}
EXPORT_SYMBOL_GPL(rockchip_clk_protect_critical);
void (*rk_dump_cru)(void);
EXPORT_SYMBOL(rk_dump_cru);
static int rk_clk_panic(struct notifier_block *this,
unsigned long ev, void *ptr)
{
if (rk_dump_cru)
rk_dump_cru();
return NOTIFY_DONE;
}
static struct notifier_block rk_clk_panic_block = {
.notifier_call = rk_clk_panic,
};
static void __iomem *rst_base;
static unsigned int reg_restart;
static void (*cb_restart)(void);
@@ -765,5 +780,7 @@ rockchip_register_restart_notifier(struct rockchip_clk_provider *ctx,
if (ret)
pr_err("%s: cannot register restart handler, %d\n",
__func__, ret);
atomic_notifier_chain_register(&panic_notifier_list,
&rk_clk_panic_block);
}
EXPORT_SYMBOL_GPL(rockchip_register_restart_notifier);

1
drivers/clk/rockchip/clk.h
View File

@@ -1037,5 +1037,6 @@ static inline void rockchip_register_softrst(struct device_node *np,
{
}
#endif
extern void (*rk_dump_cru)(void);
#endif